Soft door closer

Abstract

A door closer is a mechanical device that closes a door, which is open by push or pull action manually or automatic. The closer available in a market can involve the consideration of a variety of criteria. In addition to the closer's performance in fire situations, other criteria is resistance to opening forces (for use by disabled or infirm), control over the rate of closing, safety, durability, risk of vandalism, and aesthetics. This paper review the existing door closer available in a market. also gives the detail concept and mechanism for the new design of door closer , by using compressive spiral spring, reed valve and simple cylinder arrangement.